Sam Gerard is a well-known mobster who is about to be exposed. His estranged son, Craig Gentry, is arrested for murder, but refuses to go to Sam for help, and instead, goes to Ben Matlock.

Craig continues to turn away from his father as Matlock keeps trying to investigate the case. When the Gentry family is almost caught in the middle of a mob war with the Hernandez family, Matlock realises that someone on the inside is pulling the strings.

When Matlock's new neighbor, Les 'Ace' Calhoun, is charged with murdering the used car salesman who sold him a lemon, Matlock takes the case to prove that more than one person had a motive, and that Les is not the guilty party.